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Prevalence and Incidence Questions

Anonymous

labelMathematics

timer
Asked: Apr 10th, 2015

Question description

The team members
arrive in Rhode Island on March 1st.
They discover 13 individuals who
met the clinical/laboratory case definition with dates of rash onset in February. Ten
of these 13 are Rhode Island residents, the other three are residents of
neighboring states who were seen and treated at Brown University Medical Center
in Providence, RI. Nine of these 10 were
still ill as of March 1. The tenth, the
probable index case for the outbreak, was a teenager who had traveled to Europe
and returned three days prior to her rash onset. She had recovered from her illness by the
time the investigative team arrived.

For
the purposes of this exercise, use one million for the Rhode Island state
resident population.

Note: remember to express all rates (incidence is a rate) per unit of population and per unit of
time. Prevalence (a ratio) needs only to
be expressed per unit of population.